JPH0241783A - Friction welding equipment - Google Patents

Abstract

PURPOSE:To simplify work and equipment and to maintain joining strength and concentricity at a high level by carrying out continuously expansion work of pipe material and pressure welding of the pipe material to flange material by the movement of a mandrel. CONSTITUTION:When a cylinder 20 is contracted, the mandrel 10 is taken out to the cylinder 20 side and a forming part 13 is taken into the pipe material 30 which is expanded and formed by the forming part 13. When this expansion work is continued and the expansion position advances up to a part corresponding to a tapered hole 32 of the flange material 31, the peripheral surface of an expansion part of the pipe material 30 is abutted on the tapered hole 32. At this point of time, the rotational force is applied to a main spindle 2 and the pipe material 30 and the flange material 31 are rotated relatively in the state with these materials abutted on each other. As a result, frictional heating is generated on the abutment between both and the abutment is made in a molten state. When the mandrel 10 is taken out by the cylinder 20, the expansion force to the pipe material 30 by the forming part 13 acts as pressure welding force between the pipe material 30 and the flange material 31 and both materials are easily joined and fixed.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a friction welding device.

(Prior art) Friction welding has been widely used in the past, in which the frictional heat generated between two members that are rotated relative to each other while in contact with each other melts the contact area and presses them together. For example, Japanese Patent Application Laid-Open No. 57-15438
As disclosed in Japanese Patent No. 8, it is known that two members are brought into contact with each other on surfaces perpendicular to the direction of the rotational axis, and the two members are frictionally welded on this contact surface.

(Problem to be solved by the invention) For example, when forming a shaft body with a flange at an intermediate position in the axial direction using the friction welding method, the conventional friction welding method does not allow the connection between the two members as described above. Since the basic idea is to press in a plane perpendicular to the axis of rotation, two shafts and one flange are prepared, and the two shafts are separately rubbed against both sides of the flange. It was customary to use pressure contact. Therefore, when manufacturing it, two steps are required to press the two shaft bodies to the flanges, and this is completed in one step, and the work is done using a relatively expensive double-headed friction welding device. This poses a problem in that the production cost is high.

In addition, since one flanged shaft is constructed by friction welding three members to each other, it is difficult to align the three members and it is difficult to achieve concentricity, and the friction weld surfaces Since this is a surface perpendicular to the axial direction (that is, a surface in the same direction as the shear force loading direction), there is also a problem that the joint strength of the joint portion is impaired.

Therefore, the present invention aims to simplify the friction welding work and reduce the manufacturing cost in joining a flange material to an axially intermediate position of a pipe material by friction welding, and also to provide an I-J joint at the joint part. It is an object of the present invention to provide a friction welding device that can maintain both the strength and the concentricity between the pipe material and the flange material at a high level.

(Means for Solving the Problems) In the present invention, as a means for solving the above problems, a pipe material and a flange material having a tapered hole are friction welded with the pipe material inserted into the tapered hole. In the friction welding device, a pipe material holding means for holding the pipe material, a flange material holding means for holding the flannel material with the pipe material inserted into the tapered hole, and the pipe material and the flange material are provided. and a tapered molded part in which the diameter of the large diameter part is larger than the inner diameter of the pipe material indicated by -1-, and the tapered direction of the molded part is directed toward the flange material. a mandrel inserted into the pipe material from the large diameter side of the tapered hole in a state that is aligned with that of the tapered hole; and a mandrel driving means for moving the mandrel toward the small diameter end side of the molded part. It is characterized by having the following.

(Function) By using such a means, (+) With the pipe material passed through the tapered hole of the Franz material, the mandrel inserted into the pipe material is moved in the axial direction by the mandrel driving means. By moving the pipe material, the pipe material is sequentially expanded and formed by the forming part of the mandrel. (2) Due to the expansion molding of the pipe material, the outer peripheral surface of the expanded part comes into contact with the inner peripheral surface of the tapered hole of the flange part. By applying a relative rotational force to these two parts in a state in which they are in contact with each other by a rotating means, frictional heat is generated in the relevant contact parts, and the relevant contact parts are melted and fixed to each other.

(Effects of the Invention) Therefore, according to the friction welding device of the present invention, (1) the work of expanding the pipe material and the work of pressure welding the pipe material and the flange material can be performed by a single operation of moving the mandrel. Since it is performed continuously, the work and equipment are simpler than, for example, when these two operations are performed separately in two steps, or when they are performed using a double-headed friction welding device. (2) Since the pipe material is passed through the tapered hole of the flange material, the two are joined between the outer circumferential surface of the pipe material and the inner circumferential surface of the tapered hole. , for example, the joint strength is higher than when both are joined at a plane perpendicular to the axial direction, and for example, when a pipe material is divided into two in the axial direction and these are joined separately to both sides of the flange material. The concentricity between the pipe material and the flange material can be increased compared to the above, and other effects can be obtained.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 1 to 6.

FIG. 1 shows a friction welding device Z according to an embodiment of the present invention. This friction welding device Z connects a pipe material 30 and a flange material 31 having a tapered hole 32 formed in its axial center.
The pipe material 30 is inserted into the tapered hole 32 and friction welded to form a shaft body having a flange material in the axially intermediate portion, and is placed inside the fixedly arranged base 1. A main shaft 2 consisting of a hollow shaft is rotatably supported on the shaft. This main shaft 1 is rotated by a V-pulley 23 (which is rotated by a motor 2, which corresponds to the rotating means in the claims) via a V-pulley 23 (which is rotated by a heald 24) provided at one end 2a side thereof. Further, a first chuck 16 (corresponding to the flange material holding means in the claims) for gripping the flange material 31 is attached to the other end 2b side of the main shaft 2. Further, a drawbar 3 composed of a cylinder for gripping and releasing the first chuck 16 is disposed inside the main shaft 2.The drawbar 3 is arranged on the side of the first chuck 16. The end portion 3a of the cylinder tube 5 is connected to the piston 6 of the first cylinder 4, which is composed of a fixed cylinder tube 5 and a piston 6 inserted into the cylinder tube 5. Therefore, the operation of the first cylinder 4 is Drawbar 3 by control
By moving in the axial direction, the first chuck 16 can be gripped or released. .

Further, inside the drawbar 3, a second cylinder 7 is disposed, which is composed of a fixedly arranged sill dup 8 and a piston 9 formed of a hollow shaft fitted into the cylinder tube 8.

A mandrel 10, which will be described later, is fitted and fixed on the outer end 9a side of the piston 9 so as to be movable forward and backward.

The mandrel 10 has a tapered forming part 1 in the axial middle part.
3, and the molded part 1
The guide rod portion 11 continuous to the large diameter side end portion 13a of No. 3
It is attached to the second cylinder 7 by fitting the piston 9 into the inside of the piston 9 of the second cylinder 7. Moreover, the small diameter side end 13 of the forming part 13 of this mandrel IO
The tension rod portion 12 continuous to b passes through the axial center portion of the first bolt 16 and projects outward.

The end of this tension rod part 12 is a grip part 12a.
It is said that Incidentally, the diameter on the large diameter side of the molded portion 13 is set to be larger than the inner diameter of the pipe material 30.

Furthermore, the piston 9 of the second knolling 7 and the mandrel lO
between the guide rod part 11 (the pin 4 which is always pressed against the guide rod part il side by the spring force) and the guide rod part 11 side. A ratchet 22 consisting of a recessed portion 42 is installed in the pin receiver recessed in the pin holder.

On the other hand, a table 18 is arranged at a position in front of the first chuck 16 in the axial direction. And this table 18
At the top of the rod 19a, there is a pipe material 3.
0 gripping second chuck 17 (which corresponds to the pipe material holding means in the claims) is attached to a pair of left and right third cylinders] 9, 19, which are opposed to the mandrel IO at a coaxial position. A fourth cylinder 20 is provided with a gripping mechanism 21 for gripping the tip gripping portion 12a of the mandrel 10 at the tip of the rod 20a.

Then, the second cylinder 7, the third cylinder 19 and the fourth cylinder
The cylinder stroke of the cylinder 20 is the mandrel 1 mentioned above.
0, the pipe material 30, and the flange material 31 are set as follows according to the relative relationship. That is, the third cylinder 19
1 is a position where the pipe material 30 held by the second chuck 17 is inserted into the tapered hole 32 of the flange material 31 held by the first chuck 16 to the middle in the axial direction. (hereinafter, the position of the pipe material 30 at this time will be referred to as the forward position), and the position where the pipe material 30' is completely pulled out from the flange material 31 as shown by the chain line in the same figure (hereinafter, the position of the pipe material 30 at this time). This position is called the retracted position).

In addition, when the piston 9 and the mandrel 10 are integrated by the ratchet 22, the mandrel lO is gripped with its molded portion 3 by the expansion and contraction movement of the second cylinder 7, as shown by the solid line in FIG. An intermediate position located on both sides of the pipe material 30 in the axial direction, where the portions 12a are in the forward position, and a front end surface 30a of the pipe material 30', where the gripping portions 12a' are in the retracted position, as shown in chain lines in FIG. 2 before and after the retracted position located axially outside of '
be moved between positions. Furthermore, the mandrel lO is
When the grip part 1 is positioned at the intermediate position,
2a is in an extended state as shown by the solid line in Figure 1.''-2
It can be gripped by a gripping mechanism 21 on the fourth cylinder 20 side. Then, when the fourth nolinder 20 is contracted while the gripping mechanism 21 grips the gripping portion 12a of the mandrel jO, the mandrel 10 is pulled out from the piston 9 of the second cylinder 7 by the fourth noring 20, as shown by the chain line. The position where the molded portion 13' substantially overlaps the tapered hole 32 of the flannel material 31 (hereinafter referred to as
(referred to as the forward position). Incidentally, when the mandrel IO is pulled out from the intermediate position to the forward position side by the fourth cylinder 20, the engagement action by the radiator 22 is forcibly released.

Next, a working procedure for friction welding the pipe material 30 and the flange material 31 using this friction welding device Z will be explained with reference to FIGS. 2 to 6.

First, the mandrel 10 is set to the retracted position and the fourth printer 20 is retracted. In this state, the third cylinder 19 is further contracted and the pipe material 30 is gripped by the second cylinder 17 (retracted position of the pipe material 30),
The flange material 31 is gripped by the first jack 16. Thereafter, the third cylinder 19 is extended and the pipe material 30 is set in its advanced position (the position shown by the solid line in FIG. 1 and the position shown in FIG. 2). At this time, the tension rod portion 12 of the mandrel 10
One part of the pipe material 30 is inserted into the pipe material 30.

Next, the mandrel lO is moved from its retracted position to an intermediate position so that its gripping part 12a projects outward from the end of the pipe material 30, and the fourth cylinder 20 is extended and its gripping mechanism 21 grips the mandrel lO. Grip the portion 12a (the position shown by the solid line in FIG. 1).

After that, the fourth cylinder 20 is contracted. Then, the engagement of the radiet 22 is released, and the mandrel lO is moved to the second position.
It is pulled out from the knolling 7 side to the fourth cylinder 20 side.

Then, by drawing the forming portion I3 into the pipe material 30, the pipe +830 is sequentially expanded and formed by the forming portion 13, as shown in FIG. The expanding operation by the forming part 13 of the mandrel 10 continues, and when the expanding position advances to the part corresponding to the tapered hole 32 of the flange material 31, the outer peripheral surface of the expanded part of the pipe material 30 and the tapered hole 32 are connected. comes into contact. At this point, as shown in FIG. 4, a rotational force is applied to the main shaft 2 to cause the pipe material 30 and the flange material 31 to rotate relative to each other while they are in contact with each other. Then, frictional heat is generated at the abutting portion between the two, and this abutting portion becomes molten due to this frictional heat. At this time, as shown in FIG.
The expanding force exerted on the pipe material 30 acts as a pressing force between the pipe material 30 and the flange material 31, and the two are easily joined and fixed. Incidentally, the main shaft 2 detects a change in the tensile force of the mandrel 10 when the pipe material 30 and the flange material 31 come into contact with each other as the mandrel lO moves, creating movement resistance, and the motor 25 is activated. As a result, rotation is started, and when the friction welding is completed, an increase in rotational resistance on the main shaft 2 side is detected and the motor 25 is stopped, and a brake (not shown) is activated to suddenly stop the motor 25. ing.

After the friction welding is completed, first, the fourth ring 20 is extended to return the mandrel lO to its intermediate position, and the gripping state by the gripping mechanism 21 is released.

Then, it is detected that the mandrel 10 is set at the intermediate position from the refitting of the radiet 22, and the second cylinder 7
is operated to move the mandrel 10 to the retracted position.

Next, the second chuck 17 and the first chuck 16 are both released from their gripping states, and the molded product A is taken out (see FIG. 6).

This completes the work of friction welding the pipe material 30 and the flange material 31 to form the pipe material holding means A.

In this way, when this friction welding is completed, the mandrel 10
The preforming work of expanding the pipe material 30 by the axial movement of the pipe material 30 and the joining work of pressing the pipe material 30 and the flange material 31 are performed in combination, and the workability is very good. .

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a main part of a friction welding device according to an embodiment of the present invention, and FIGS. 2 to 6 are work progress diagrams of friction welding work performed by the friction welding device Z. 1...Base 2...Main shaft 4.719.20 Cylinder 69...Piston 10...Mandrel 13...Molding part 16.17...Chuck 21... ... Gripping mechanism 30 ... Pipe material 31 ... Flange hole 32 ... Taber hole

Claims (1)

[Claims] 1. A friction welding device for friction welding a pipe material and a flange material having a tapered hole with the pipe material inserted into the tapered hole, the device comprising: a pipe material holding means for holding the pipe material; and the flange material having a tapered hole; a flange material holding means for holding the pipe material in a state in which the pipe material is inserted into the tapered hole; a rotating means for imparting relative rotation between the pipe material and the flange material; It has a tapered molded part that is larger than the inner diameter of the pipe material, and the taper direction of the molded part matches that of the tapered hole of the flange material, and the inside of the pipe material is inserted from the large diameter side of the tapered hole. 1. A friction welding device comprising: a mandrel that is inserted through the molded portion; and a mandrel drive means that moves the mandrel toward the small diameter end of the molded portion.